Quick Check. Which shape has the greatest area? Shape Shape Shape Shape A Shape B Shape C Shape D Shape. What is the area of this shape? A 5 square inches 5 square centimeter B 5 square centimeters C 6 square inches D 6 square centimeters. Writing to Explain Diego is planning to make party invitations. He wants each invitation card to have an area of square units. Should he use square centimeters or square inches as a unit? Use -inch grid paper and centimeter grid paper to draw shapes to help you decide. Explain your answer. Q 6 6B
Partner Talk Share your thinking while you work. Get Started or Repeat for Each Round Put in a bag. Get grid paper and a pencil. Choose a, b, c, d, e, f, g, h, i, or j. Pick a tile. Pick two tiles if your group has only two students. Take turns finding the area of the polygon in square. Use the method next to your tile number. Count the squares. Begin at the bottom of the figure. Count the squares. Begin at the top of the figure. Count the squares. Begin on the left side of the figure. Count the squares. Begin on the right side of the figure. a b c d e f g h i j If you have more time one square foot Use grid paper. Choose one of the polygons on this page. Draw a different polygon that has the same area. Center Activity H
Partner Talk Share your thinking while you work. 0 Get Started Put in a bag. Get grid paper and a pencil. 5 6 7 8 9 Repeat for Each Round Pick a tile. Look at the bottom of the page. Find the area next to your tile number. Find a polygon with that area. Explain your choice. Place your tile on that polygon. Repeat until the bag of tiles is empty. a a. b c b. c. d e e. d. g g. f f. j h i h. i. j. one square foot 0 9 square 5 square square 8 square square 5 8 square 6 square 7 8 square 8 0 square 9 6 square If you have more time Use grid paper. Choose one of the polygons on this page. Draw a different polygon that has the same area. Center Activity HH
Area and Units Reteaching A square unit is a square with sides that are each unit long. 5 square unit The number of square units needed to cover the region inside a figure is its area. Pam wants to make flash cards for her study group. She wants each flash card to have an area of 5 square units. Should she use square centimeters or square inches as a unit? cm in. 5 cm = square centimeter A square centimeter is a square that has a length of cm on each side. If Pam uses square centimeters the area would be 5 square centimeters. That seems too small for a flash card. 5 in. = square inch A square inch is a square that has a length of inch on each side. If Pam uses square inches the area would be 5 square inches. That seems a reasonable size for a flash card. Pam should use square inches as the unit. What is the area of each figure shown below?.. 6 cm in. in. cm. Is the area of a paperback book cover closer to 8 square inches or 8 square centimeters? Tell how you decided.. Maria wants to draw a painting with an area of 0 square inches. If she drew her painting on -inch grid paper how many squares would the painting cover? Tell how you know. R 6 6B
Area and Units. Use a ruler to draw a figure with an area of square centimeters.. Which of these figures has an area of 6 square inches? Practice Figure A Figure B = square inch Figure. Draw a Picture Maya made a sign with an area of 8 square centimeters. Use centimeter grid paper to draw a shape that shows what her sign could look like.. Suppose Maya made another sign with an area of 8 square inches. Would this sign be larger or smaller than the sign with an area of 8 square centimeters? Explain how you know. 5. What is the area of this figure in square centimeters? = square centimeter A B C 5 D 7 P 6 6B
Operation Math Thunder and Lightning One lightning flash in the sky releases bolts in less than second. These lightning bolts superheat the air around them. The air particles move so quickly that they break the speed of sound. This causes the sound known as thunder.. Complete the picture of lightning bolts for 7 flashes. How many bolts are there? What operation is reasonable for the picture you drew? Enrichment FLASH FLASH FLASH FLASH FLASH FLASH FLASH Operation You can tell how far away lightning strikes by counting the number of seconds from the time you see the flash until the time you hear thunder. Lightning strikes mile away for every 5 seconds counted.. Complete the picture of how many seconds pass if the lightning struck miles away. What operation is reasonable for the picture you drew? SF_EN0_06_ Seconds Mile Mile Mile Mile Operation SF_EN0_06_a E 6 6B